    <link rel="stylesheet" href="demo.css">
    <div class="box box1">
        <img src="./imgs/img1.jpg" alt="">
        <ul>
            <li class="active"></li>
            <li></li>
            <li></li>
            <li></li>
            <li></li>
            <li></li>
        </ul>
    </div>
    
    
    <div class="box box2">
        <img src="./imgs/img1.jpg" alt="">
        <ul>
            <li class="active"></li>
            <li></li>
            <li></li>
            <li></li>
            <li></li>
            <li></li>
        </ul>
    </div>

    <script src="./demo.js"></script>
    <script>
    let lbtobj1 = new Lbt(".box1")
    let lbtobj2 = new Lbt(".box2")
    </script>